Add dnsapi for Vultr (#2370)

* Add Vultr dns api

dnsapi/dns_vultr.sh

@@ -0,0 +1,163 @@
+#!/usr/bin/env sh
+
+#
+#VULTR_API_KEY=000011112222333344445555666677778888
+
+VULTR_Api="https://api.vultr.com/v1"
+
+########  Public functions #####################
+
+#Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_vultr_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  VULTR_API_KEY="${VULTR_API_KEY:-$(_readaccountconf_mutable VULTR_API_KEY)}"
+  if test -z "$VULTR_API_KEY"; then
+    VULTR_API_KEY=''
+    _err 'VULTR_API_KEY was not exported'
+    return 1
+  fi
+
+  _saveaccountconf_mutable VULTR_API_KEY "$VULTR_API_KEY"
+
+  _debug 'First detect the root zone'
+  if ! _get_root "$fulldomain"; then
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug 'Getting txt records'
+  _vultr_rest GET "dns/records?domain=$_domain"
+
+  if printf "%s\n" "$response" | grep "\"type\":\"TXT\",\"name\":\"$fulldomain\"" >/dev/null; then
+    _err 'Error'
+    return 1
+  fi
+
+  if ! _vultr_rest POST 'dns/create_record' "domain=$_domain&name=$_sub_domain&data=\"$txtvalue\"&type=TXT"; then
+    _err "$response"
+    return 1
+  fi
+
+  _debug2 _response "$response"
+  return 0
+}
+
+#fulldomain txtvalue
+dns_vultr_rm() {
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  VULTR_API_KEY="${VULTR_API_KEY:-$(_readaccountconf_mutable VULTR_API_KEY)}"
+  if test -z "$VULTR_API_KEY"; then
+    VULTR_API_KEY=""
+    _err 'VULTR_API_KEY was not exported'
+    return 1
+  fi
+
+  _saveaccountconf_mutable VULTR_API_KEY "$VULTR_API_KEY"
+
+  _debug 'First detect the root zone'
+  if ! _get_root "$fulldomain"; then
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug 'Getting txt records'
+  _vultr_rest GET "dns/records?domain=$_domain"
+
+  if printf "%s\n" "$response" | grep "\"type\":\"TXT\",\"name\":\"$fulldomain\"" >/dev/null; then
+    _err 'Error'
+    return 1
+  fi
+
+  _record_id="$(echo "$response" | tr '{}' '\n' | grep '"TXT"' | grep "$txtvalue" | tr ',' '\n' | grep -i 'RECORDID' | cut -d : -f 2)"
+  _debug _record_id "$_record_id"
+  if [ "$_record_id" ]; then
+    _info "Successfully retrieved the record id for ACME challenge."
+  else
+    _info "Empty record id, it seems no such record."
+    return 0
+  fi
+
+  if ! _vultr_rest POST 'dns/delete_record' "domain=$_domain&RECORDID=$_record_id"; then
+    _err "$response"
+    return 1
+  fi
+
+  _debug2 _response "$response"
+  return 0
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+# _domain_id=sdjkglgdfewsdfg
+_get_root() {
+  domain=$1
+  i=1
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      return 1
+    fi
+
+    if ! _vultr_rest GET "dns/list"; then
+      return 1
+    fi
+
+    if printf "%s\n" "$response" | grep '^\[.*\]' >/dev/null; then
+      if _contains "$response" "\"domain\":\"$_domain\""; then
+        _sub_domain="$(echo "$fulldomain" | sed "s/\\.$_domain\$//")"
+        _domain=$_domain
+        return 0
+      else
+        _err 'Invalid domain'
+        return 1
+      fi
+    else
+      _err "$response"
+      return 1
+    fi
+    i=$(_math "$i" + 1)
+  done
+
+  return 1
+}
+
+_vultr_rest() {
+  m=$1
+  ep="$2"
+  data="$3"
+  _debug "$ep"
+
+  api_key_trimmed=$(echo $VULTR_API_KEY | tr -d '"')
+
+  export _H1="Api-Key: $api_key_trimmed"
+  export _H2='Content-Type: application/x-www-form-urlencoded'
+
+  if [ "$m" != "GET" ]; then
+    _debug data "$data"
+    response="$(_post "$data" "$VULTR_Api/$ep" "" "$m")"
+  else
+    response="$(_get "$VULTR_Api/$ep")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "Error $ep"
+    return 1
+  fi
+
+  _debug2 response "$response"
+  return 0
+}